Effects of partial oxidation of PMAN carbon on their performance as anodes in 1M LiPF{sub 6}/EC-DMC solutions | Zendy

R.A. Guidotti | Zendy

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Effects of partial oxidation of PMAN carbon on their performance as anodes in 1M LiPF{sub 6}/EC-DMC solutions

Author(s) -

R.A. Guidotti

Publication year - 1996

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/486069

Subject(s) - electrochemistry , ethylene carbonate , oxidizing agent , cyclic voltammetry , carbonate , carbon fibers , passivation , dimethyl carbonate , chemistry , partial oxidation , dielectric spectroscopy , inorganic chemistry , materials science , chemical engineering , layer (electronics) , electrode , organic chemistry , electrolyte , catalysis , composite number , composite material , engineering

A study was undertaken to examine the effects of partial oxidation on the electrochemical performance of carbons derived from poly(methylacrylonitrile) (PMAN)-divinylbenzene (DVB) co-polymers. Mild oxidation was examined as a possible technique to increase the reversible capacity, improve cycleability, and reduce the amount of irreversible capacity associated with the formation of the passivation layer during the first reduction. Oxidizing conditions involved treatment of the PMAN carbon prepared at 700 C with dry CO{sub 2} or with steam at 600 C for one hour. The effects on the performance in 1M LiPF{sub 6}/ethylene carbonate (EC)-dimethyl carbonate (DMC) solutions were evaluated by galvanostatic cycling tests, complex-impedance spectroscopy, and, to a more limited extent, cyclic voltammetry. Partial oxidation of PMAN carbon showed little or no overall beneficial effects in performance relative to the control

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